Open this video of a "boy sliding" across the ice. The screen shows a data table, a position against time graph, and a velocity
against time graph. The symbols used are t for time, x for position, vx for velocity, and ax for acceleration. Click the play button, and watch the video. Then study the position against time graph. What is the change in the motion of the boy? How do you know? Is the acceleration of the boy positive or negative?
The change in motion is being decreased. I know this because the graph shows that every 0.5 seconds it is slightly being increased by distance causing there to be more drag resulting in there being a increase in time. the acceleration is negative.
